Charleston, IL Weather Forecast
Local 7-day forecast
Slight Chance Rain Showers then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Charleston, IL in one place.
A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 79. East southeast wind 5 to 8 mph. Chance of precipitation is 40%.
Local Weather Overview
This forecast page for Charleston, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: May 23, 2026 12:23 PM CDT.
The active forecast window currently covers May 26 to May 29, 2026 for Charleston, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 26 to May 29, 2026
- Latest sync
- May 23, 2026 12:23 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Charleston
Thursday looks like the warmest upcoming period in Charleston at 81 degrees F.
Friday Night is the coolest period ahead with temperatures near 57 degrees F.
The strongest winds are forecast for Friday at about 8 to 13 mph ENE.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- May 23, 2026 12:23 PM CDT
- Coverage
- 4 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KILX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms before 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 66. Chance of precipitation is 70%.
Showers and thunderstorms. Mostly cloudy, with a high near 80. Chance of precipitation is 80%.
Showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
A slight chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 81.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
A slight chance of rain showers. Partly sunny, with a high near 77.
A slight chance of rain showers before 7pm. Partly cloudy, with a low around 57.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
May 26
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
79°F |
5 to 8 mph
ESE
|
|
Tuesday Night
May 26
|
Chance Showers And Thunderstorms
|
66°F |
7 mph
ESE
|
|
Wednesday
May 27
|
Showers And Thunderstorms
|
80°F |
7 mph
SE
|
|
Wednesday Night
May 27
|
Showers And Thunderstorms then Chance Showers And Thunderstorms
|
66°F |
6 mph
ESE
|
|
Thursday
May 28
|
Chance Showers And Thunderstorms
|
81°F |
5 to 8 mph
E
|
|
Thursday Night
May 28
|
Chance Showers And Thunderstorms
|
63°F |
8 mph
ENE
|
|
Friday
May 29
|
Slight Chance Rain Showers
|
77°F |
8 to 13 mph
ENE
|
|
Friday Night
May 29
|
Slight Chance Rain Showers then Partly Cloudy
|
57°F |
10 mph
ENE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Charleston.
